source: vbox/trunk/src/VBox/Additions/x11/x11include/xorg-server-1.4.2/vbeModes.h

/*
 * Copyright © 2002 David Dawes
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Except as contained in this notice, the name of the author(s) shall
 * not be used in advertising or otherwise to promote the sale, use or other
 * dealings in this Software without prior written authorization from
 * the author(s).
 *
 * Authors: David Dawes <[email protected]>
 *
 */

#ifndef _VBE_MODES_H

/*
 * This is intended to be stored in the DisplayModeRec's private area.
 * It includes all the information necessary to VBE information.
 */
typedef struct _VbeModeInfoData {
    int mode;
    VbeModeInfoBlock *data;
    VbeCRTCInfoBlock *block;
} VbeModeInfoData;

#define V_DEPTH_1       0x001
#define V_DEPTH_4       0x002
#define V_DEPTH_8       0x004
#define V_DEPTH_15      0x008
#define V_DEPTH_16      0x010
#define V_DEPTH_24_24   0x020
#define V_DEPTH_24_32   0x040
#define V_DEPTH_24      (V_DEPTH_24_24 | V_DEPTH_24_32)
#define V_DEPTH_30      0x080
#define V_DEPTH_32      0x100

#define VBE_MODE_SUPPORTED(m)   (((m)->ModeAttributes & 0x01) != 0)
#define VBE_MODE_COLOR(m)       (((m)->ModeAttributes & 0x08) != 0)
#define VBE_MODE_GRAPHICS(m)    (((m)->ModeAttributes & 0x10) != 0)
#define VBE_MODE_VGA(m)         (((m)->ModeAttributes & 0x40) == 0)
#define VBE_MODE_LINEAR(m)      (((m)->ModeAttributes & 0x80) != 0 && \
                                 ((m)->PhysBasePtr != 0))

#define VBE_MODE_USABLE(m, f)   (VBE_MODE_SUPPORTED(m) || \
                                 (f & V_MODETYPE_BAD)) && \
                                VBE_MODE_GRAPHICS(m) && \
                                (VBE_MODE_VGA(m) || VBE_MODE_LINEAR(m))
                                
#define V_MODETYPE_VBE          0x01
#define V_MODETYPE_VGA          0x02
#define V_MODETYPE_BAD          0x04

extern int VBEFindSupportedDepths(vbeInfoPtr pVbe, VbeInfoBlock *vbe,
                                  int *flags24, int modeTypes);
extern DisplayModePtr VBEGetModePool(ScrnInfoPtr pScrn, vbeInfoPtr pVbe,
                                        VbeInfoBlock *vbe, int modeTypes);
extern void VBESetModeNames(DisplayModePtr pMode);
extern void VBESetModeParameters(ScrnInfoPtr pScrn, vbeInfoPtr pVbe);


/*
 * Note: These are alternatives to the standard helpers.  They should
 * usually just wrap the standard helpers.
 */
extern int VBEValidateModes(ScrnInfoPtr scrp, DisplayModePtr availModes,
                            char **modeNames, ClockRangePtr clockRanges,
                            int *linePitches, int minPitch, int maxPitch,
                            int pitchInc, int minHeight, int maxHeight,
                            int virtualX, int virtualY, int apertureSize,
                            LookupModeFlags strategy);
extern void VBEPrintModes(ScrnInfoPtr scrp);

#endif /* VBE_MODES_H */